Gravity, stability and cosmological models

Research output: Contribution to journalReview articlepeer-review


Stability analysis plays a major rule in our understanding of nature. For example it was shown that among empty flat spacetimes only those with a Lorentzian metric are stable [A. Yahalom, Found Phys. 38 (2008) 489-497; Int. J. Mod. Phys. D 18(4) (2009) 2155-2158]. However, the universe is not empty and the energy momentum tensor is metric dependent an thus effects stability. In this essay we concentrate on simple perturbations of the standard cosmological model with and without cosmological constant which is based on a uniform mass distribution. The results suggest that while Euclidean, open or closed section models are valid solutions, the choice of stable solutions is limited. In particular, the popular Lambda-CDM model is unstable.

Original languageEnglish
Article number1743026
JournalInternational Journal of Modern Physics D
Issue number12
StatePublished - 10 Oct 2017


  • Gravity
  • cosmological models
  • stability

All Science Journal Classification (ASJC) codes

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science


Dive into the research topics of 'Gravity, stability and cosmological models'. Together they form a unique fingerprint.

Cite this